A pebble is dropped into a deep well and is heard to hit the ground 3.75 seconds after being dropped. Determine the depth of the well. (show solution)

Q: While you are stopped at a red light, an ambulance is moving away from you at 30 m/s with its siren…

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Q: How is it possible to detect the filling of a bottle under a water tap by hearing the sound at a…

A: The pitch of a sound is inversely proportional to the length of vibrating air column.

Q: Choose the BEST answer to the following: The phenomenon of beats is the result of sound (a)…

A: Beats is a pattern formed due to two sound waves with the same amplitude and slightly different…

Q: A man is standing at a distance of 12m from a cliff. Will he be able to hear a clear echo of his…

A: The distance of a man from the cliff is given as d=12 m

Q: A firework blows up high in the sky 35 m away from you. The firework produces 90 W of sound power,…

A: The intensity of the sound waves is,

Q: A man sitting in his car which is stopped sounds his horn that has a frequency of (4.7000x10^2) Hz.…

A:

Q: A rock is dropped into a well to determine its depth. It takes 2.5s for the splash to be heard;…

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Q: Sound having frequencies above the range of human hearing (about 20,000 Hz) is called ultrasound.…

A: Given: The speed is v=1500 m/s. The wavelength is λ=1 mm. The expression for frequency (f) of sound…

Q: The two sources of sound in the figure face each other and emit sounds of equal amplitude and equal…

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Q: 12.Why the siren on an ambulance has a high pitch when it is approaching you and a low pitch when it…

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Q: Your ears are sensitive to differences in pitch, but they are not very sensitive to differences in…

A: The expression for the intensity,   Initial sound intensity,   The initial intensity,

Q: What are conditions for sound to interfere?

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Q: Consider the figure below. r=1 m r=2 m T= 3 m Indicate over how many squares the sound waves would…

A: Calculating the number of squares of area and intensity factor at the distance r = 6 m:

Q: What are the closest frequencies to 500 Hz that an average person can clearly distinguish as being…

A: Given:  Frequency, f = 500 Hz

Q: hat factor is the sound  intensity reduced if ear  protectors

A: if ear  protectors can reduce sound  levels by 40 dB Find:- By what factor is the sound intensity…

Q: A standing wave makes 4 loops on a string of 1 meter long, what is a wavelength? Enter your answer…

A:

Q: Remaining Time: 22 minutes, 28 seconds. ¥ Question Completion Status: 1 MHz QUESTION 19 Diffraction…

A: 19. Diffraction is the phenomenon in which there is a bending of the light rays around an obstacles…

Q: Which one of the following CANNOT transmit sound? a. Liquid air b. Gaseous oxygen c. Liquid…

A: Given: sound waves

Q: Superposition of two waves in the same phase to produce maximum intensity is known as Contractile…

A: Same phase,wave vector and frequency create coherent source. Superposition of two wave produce…

Q: The amplitude of an element on a standing wave of 2-m wavelength equals 1.5 times the amplitude of…

A: Given data: The wavelength of an element on a standing wave is, λ=2 m. The amplitude of an element…

Q: 62. The diagram below shows a standing wave. Point A on the standing wave is (1) a node resulting…

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Q: The wavelength of a stationary wave is equal to 16 cm, so the distance between two adjacent nodes is…

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Q: sound level measured in a room by a person watching a movie on a home theater system varies from…

A: Loudness of sound increase 10 times in increase of 10dB.

Q: Which term best describes what occurs when the waves below interact with one another? 0.4 A…

A:

Q: A football fan sits in the upper deck of a large football stadium and has a portable sound device to…

A: Sound audible at distance d = 500 m Loudness (in db) = 90 dB

Q: A sound level of 60 dB is measured at a distance of 40 m from a lion when it roars. What sound level…

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Q: The figures show standing waves of sound in six organ pipes of the same length. Each pipe has one…

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Q: Suppose you are standing on the passenger-loading platform of the commuter railway line. As the…

A: According to Doppler Effect, when the train is approaching the station, the pitch will be more than…

Q: A sound of wavelength 1.2 m and another of wavelength 1.0 m are played simultaneously. What beat…

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Q: wwww

A: Constructive interference occurs when the crests or troughs of two or more waves superimpose. As…

Q: A fire engine siren emits sound at 1260 Hz. The fire engine is driving down the street toward you at…

A:

Q: The sound level of a device is 155-dB. Convert this sound level to the the sound intensity. Submit a…

A: The relation between the sound intensity and dB is level is  dB = 10 logIIo

Q: A car horn has a frequency of 720 Hz. In which of the following situations would you hear an average…

A: when there is relative velocity between a source and observer then the frequency of the sound change…

Q: The decibel level of a single race car is 70 dB. What would the dB level be if 100 identical cars…

A: Decibel level can be written as B = 10 log10(I/I0) Where I is intensity of sound and I0 is reference…

Q: In just tuning, the ratio for a major third is 5/4. In equally tempered tuning, the ratio is 1.260.…

A: Given, Frequency = 500Hz tuning ratio = 1.260  we have to evaluate difference in frequency in two…

Q: A hollow tube of length (, open at both ends as shown above, is held in midair. A tuning fork with a…

A: Given Data: Tube length=l Frequency of vibration=fo Initial vibration is in fundamental mode; Pipe…

Q: A stone is dropped into a deep well and is heard to hit the water 2.2 s after being dropped. The…

A: The time for hitting the water =2.2s  The initial velocity =0m/s To find the depth of the well

Q: A standing wave makes 10 loops on a string of 2 meters long, what is a wavelength? Enter your answer…

A: No. of loops = 10 L = 2 m λ = ?

Q: Anna plays her guitar that creates 826 Hz. Find the wavelength if the speed of sound in air at room…

A:

Q: 12) The figure below shows the maximum displacement for a standing wave patter. The earliest time…

A: The wave function for two waves that interfere to produce the standing wave pattern-

Q: 13.) When the crest of one wave passes through the trough of another wave, what takes place? a.…

A: When the crest of one wave passes through the trough of another wave , then it results in lower…

Q: As you pour water into a glass, you repeatedly tap the glass with a spoon. As the tapped glass is…

A: The lowness or highness of the sound is defined by its pitch, and the pitch depends on the…

Q: The figures show standing waves of sound in six organ pipes of the same length. Each pipe has one…

A:

Q: The sound level measured in a room by a person watching a movie on a home theater system varies from…

A: Given data The first sound level is given as dB1 = 45 dB. The second sound level is given as dB2 =…

Shock Waves

Shock waves are common in continuum mechanics, and their dominance is attributable to the fact that they are stronger (or even less) compressible. Substantial perturbations propagated as sudden dynamic changes of a compressible medium supersonically. Shock waves are all around us in our daily lives. Lightning, earthquakes, volcanic eruptions, and meteorite impact all produce them in nature. Even the earth, which is protected by its magnetic field, generates a shock wave as in solar wind that travels around 20 Earth radiuses. These shock waves might be either constant, linked to the body, or unsteady, i.e., moving around with time. All of the shocks mentioned above can be damaging, so precautions must be taken to reduce their impact.